Matthew Mercer is an American voice actor who has built an extensive career since the early 2000s, becoming a prominent figure in the English dubbing of Japanese anime. He began his work in the industry providing background voices and additional character performances, and has since voiced a wide array of leading and supporting roles across numerous popular series.

Mercer is known for his versatility and has taken on many iconic characters. Some of his most notable anime roles include Levi Ackerman in the long-running series Attack on Titan, Jotaro Kujo in JoJo's Bizarre Adventure starting from the Stardust Crusaders arc, and Trafalgar Law in the Funimation dub of One Piece. He also voices Kagaya Ubuyashiki, the leader of the Demon Slayer Corps, in Demon Slayer: Kimetsu no Yaiba. His film work includes voicing Leon S. Kennedy in the animated Resident Evil films Damnation, Vendetta, and Death Island, as well as Tony Stark / Iron Man in Iron Man: Rise of Technovore and Avengers Confidential: Black Widow & Punisher.

His filmography demonstrates frequent work with major dubbing studios and recurring roles in long-running franchises. In addition to the titles listed by the user, his credits include Kiritsugu Emiya in the Fate series, Yusuke Kitagawa in Persona 5: The Animation, Leorio Paradinight in Hunter × Hunter (2011 series), and Falco in Cyberpunk: Edgerunners. He also voiced Seijirō Kikuoka in Sword Art Online, Gueira in the film Promare, and Bemular in the Netflix series Ultraman. Other roles include Sinbad in Magi: The Labyrinth of Magic, Kanji Tatsumi in Persona 4: The Animation, Aikurō Mikisugi in Kill la Kill, and Kuroh Yatogami in the K series.

In addition to his voice work in animation, Mercer has an extensive career in video games. He is known for roles such as Leon S. Kennedy in Resident Evil 6, Chrom in Fire Emblem Awakening, Jack Cooper in Titanfall 2, and Cole Cassidy in Overwatch. He is also the Dungeon Master and chief creative officer for the acclaimed web series Critical Role, a live-streamed Dungeons & Dragons campaign, through which he has expanded his work into game design and production.